When ten-year-old Jacky Gaskell meets Frank McGovern on the day of his dad's funeral, he has no idea of the impact the meeting will have on his life. Frank is Jacky's real father - something he is only told when Frank is hanged for a murder he didn't commit. Jacky is convinced Frank was innocent and enlisting the help of his sister Ellie, embarks on a series of plans and stunts to bring the real killer to justice. When their actions backfire, they attract the attention of the police - and the more sinister attentions of the real murderer.